11100121010021 has 32 divisors (see below), whose sum is σ = 11873584800000. Its totient is φ = 10357664970240.

The previous prime is 11100121009969. The next prime is 11100121010039. The reversal of 11100121010021 is 12001012100111.

It is a cyclic number.

It is not a de Polignac number, because 11100121010021 - 2¹⁰ = 11100121008997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11100121009984 and 11100121010011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100121010081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 855230510 + ... + 855243488.

It is an arithmetic number, because the mean of its divisors is an integer number (371049525000).

Almost surely, 2^{11100121010021} is an apocalyptic number.

It is an amenable number.

11100121010021 is a deficient number, since it is larger than the sum of its proper divisors (773463789979).

11100121010021 is a wasteful number, since it uses less digits than its factorization.

11100121010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19757.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11100121010021 its reverse (12001012100111), we get a palindrome (23101133110132).

The spelling of 11100121010021 in words is "eleven trillion, one hundred billion, one hundred twenty-one million, ten thousand, twenty-one".